Count match : String search « Data Type « Java

1. Java
2. Data Type
3. String search

Count match

        

/*
 * @(#)$Id: StringUtils.java 3619 2008-03-26 07:23:03Z yui $
 *
 * Copyright 2006-2008 Makoto YUI
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * 
 * Contributors:
 *     Makoto YUI - initial implementation
 */
//package xbird.util.string;


/**
 * 
 * <DIV lang="en"></DIV>
 * <DIV lang="ja"></DIV>
 * 
 * @author Makoto YUI (yuin405+xbird@gmail.com)
 */
public final class StringUtils {
    public static boolean isEmpty(final String str) {
        return (str == null || str.length() == 0);
    }
    public static int countMatches(final String str, final String sub) {
        if(isEmpty(str) || isEmpty(sub)) {
            return 0;
        }
        int count = 0;
        int idx = 0;
        while((idx = str.indexOf(sub, idx)) != -1) {
            count++;
            idx += sub.length();
        }
        return count;
    }

    public static int countMatches(final String str, final char c) {
        if(isEmpty(str)) {
            return 0;
        }
        int count = 0;
        final int size = str.length();
        for(int i = 0; i < size; i++) {
            if(str.charAt(i) == c) {
                count++;
            }
        }
        return count;
    }
}

   
    
    
    
    
    
    
    
  

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